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Measurement of (<sup>4</sup>He, <sup>6</sup>Li) Proton-neutron Pair Transfer Reaction for the Study of Proton-neutron Pair Condensation

ORAL

Abstract

Fermion pair condensation is expected to be a universal phenomenon in the mass hierarchy of many body systems such as atoms, nuclei, and quarks. Nucleon pair condensation plays important roles in both nuclei and nucleonic matter, or neutron stars. The pair rotation is a signal of pair condensation, in which the transition to ground state is much stronger than that to excited state. The existence of the condensation of neutron-neutron (nn) pairs was confirmed in Sn isotopes, while the condensation of proton-neutron (pn) pairs in the 3S1 channel is still not discovered. A two-nucleon transfer reaction (α, 6Li) is a good candidate for an effective probe, providing clear identification of the spin-parity of the final state and a good momentum matching condition. In this research, the reaction study was performed.

An experiment was performed in the region N-Z=20 at CYRIC in Tohoku University. The measured result shows relatively strong transitions to ground state and/or the first excited state. We will perform another experiment at RCNP in Osaka University to obtain the forward-angle cross section of the same reaction. In this presentation, I will report our experimental result of the (α, 6Li) reaction on 120Sn and discuss the effectiveness of such a probe of the pn-condensation.

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Presenters

  • Jiawei CAI

    Institute of Modern Physics, Chinese Academy of Sciences

Authors

  • Jiawei CAI

    Institute of Modern Physics, Chinese Academy of Sciences

  • Shinsuke Ota

    Research Center for Nuclear Physics, Osaka University, RCNP, Osaka University

  • Masanori Dozono

    RIKEN Nishina Center, Department of Physics, Kyoto University, Kyoto University, Graduate School of Science, Kyoto University, Kyoto University, Japan

  • Satoshi Adachi

    CYRIC, Tohoku University, CYRIC, Tohoku Universty, Cyclotron and Radioisotope Center, Tohoku University, Department of Physics, Osaka University, Cyclotron and Rareisotope Center, Tohoku University

  • Shutaro Hanai

    Center for Nuclear Study, the University of Tokyo, Center for Nuclear Study, The University of Tokyo

  • Yuto Hijikata

    Kyoto Univ, Graduate School of Science, Kyoto University, Kyoto University, RIKEN Nishina Center & Department of Physics, Kyoto University

  • Genki Hosoya

    CYRIC, Tohoku University, Cyclotron and Radioisotope Center, Tohoku University

  • Nobuaki Imai

    Center for Nuclear Study, the University of Tokyo, Center for Nuclear Study, The University of Tokyo, CNS, University of Tokyo, CNS, University of Tokyo, Japan, Center for Nuclear Study, University of Tokyo

  • Masatoshi Itoh

    CYRIC, Tohoku University, Cyclotron and Radioisotope Center, Tohoku University

  • Noritaka Kitamura

    Center for Nuclear Study, The University of Tokyo, CNS, University of Tokyo

  • Shin'ichiro Michimasa

    CNS, The University of Tokyo, The University of Tokyo, Center for Nuclear Study, the University of Tokyo, Center for Nuclear Study, The University of Tokyo, CNS, University of Tokyo, CNS, University of Tokyo, Japan

  • Takeshi Y Saito

    Center for Nuclear Study, the University of Tokyo, RIKEN AMO physics Laboratory, RIKEN AMO Physics Laboratory, Center for Nuclear Study, the University of Tokyo, Atomic, Molecular, and Optical Physics Laboratory, RIKEN

  • Shumpei Yamazaki

    CYRIC, Tohoku University, Cyclotron and Radioisotope Center, Tohoku University

  • Shohei Yonekura

    CYRIC, Tohoku University, Cyclotron and Radioisotope Center, Tohoku University